/*
 * Copyright 2025 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package androidx.xr.runtime.openxr

import androidx.annotation.RestrictTo
import androidx.xr.arcore.internal.ArDevice
import androidx.xr.runtime.math.Pose

/** Wraps the device tracking data. */
@RestrictTo(RestrictTo.Scope.LIBRARY_GROUP_PREFIX)
public class OpenXrDevice internal constructor() : ArDevice, Updatable {

    override var devicePose: Pose = Pose()
        private set

    override fun update(xrTime: Long) {
        // Keep the device pose as the previous one if native returns null.
        devicePose = nativeGetHeadPose(xrTime) ?: devicePose
    }

    private external fun nativeGetHeadPose(timestampNs: Long): Pose?
}
